This is to inform you that Adventures and Garmin Cloud services will be discontinued after May 20th, 2018. Users can access these applications through the published date to retrieve their data. The Adventures on your computer will be left in place but find and publishing will be discontinued. Users who wish to sync their data to a third party Cloud storage service may do so by modifying the Database Options in BaseCamp to point it to a folder under the Cloud storage service root.
I have the latest BaseCamp for both Windows and Mac. The equivalent Mac option is BaseCamp - Preferences - Advanced - New Library. Point to ANY cloud drive you have such as Google Drive, OneDrive......